Merck & Co., Inc.
BG ˙ BUL ˙ US58933Y1055
SecurityBG:6MK / Merck & Co., Inc.
InstitutionCsenge Advisory Group
Latest Disclosed Ownership15,172 shares
Latest Disclosed Value $ 1,825,098
Csenge Advisory Group reports 15.63% increase in ownership of 6MK / Merck & Co., Inc.

On April 30, 2026 - Csenge Advisory Group filed a 13F-HR form disclosing ownership of 15,172 shares of Merck & Co., Inc. (BG:6MK) valued at $1,825,098 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 13,121 shares of Merck & Co., Inc.. This represents a change in shares of 15.63% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-04-30 2026-03-31 13F MERCK COM 58933Y105 15,172 2,051 15.63 1,825 32.15 0.0835
2026-02-06 2025-12-31 13F MERCK COM 58933Y105 13,121 685 5.51 1,381 32.41 0.0625
2025-10-28 2025-09-30 13F MERCK COM 58933Y105 12,436 -4,220 -25.34 1,044 -18.45 0.0498
2025-08-06 2025-06-30 13F MERCK COM 58933Y105 16,656 232 1.41 1,280 -0.16 0.0673
2025-05-05 2025-03-31 13F MERCK COM 58933Y105 16,424 -4,810 -22.65 1,281 -39.35 0.0727
2025-01-30 2024-12-31 13F MERCK COM 58933Y105 21,234 -7,078 -25.00 2,112 -32.00 0.1147
2024-11-13 2024-09-30 13F MERCK COM 58933Y105 28,312 -1,954 -6.46 3,107 -17.08 0.1620
2024-07-10 2024-06-30 13F MERCK COM 58933Y105 30,266 509 1.71 3,747 -4.58 0.2126
2024-05-03 2024-03-31 13F MERCK COM 58933Y105 29,757 2,442 8.94 3,926 31.88 0.2199
2024-02-13 2023-12-31 13F MERCK COM 58933Y105 27,315 607 2.27 2,978 8.29 0.1855
2023-11-01 2023-09-30 13F MERCK COM 58933Y105 26,708 -2,336 -8.04 2,750 -17.96 0.1873
2023-07-20 2023-06-30 13F MERCK COM 58933Y105 29,044 725 2.56 3,351 11.25 0.2247
2023-05-01 2023-03-31 13F MERCK COM 58933Y105 28,319 -1,883 -6.23 3,013 -10.09 0.2175
2023-02-10 2022-12-31 13F MERCK COM 58933Y105 30,202 350 1.17 3,351 167,400.00 0.2596
2022-10-04 2022-09-30 13F MERCK COM 58933Y105 29,852 -196 -0.65 3 0.00 0.2133
2022-07-27 2022-06-30 13F MERCK COM 58933Y105 30,048 7,302 32.10 3 100.00 0.2295
2022-05-09 2022-03-31 13F MERCK COM 58933Y105 22,746 -4,239 -15.71 2 -50.00 0.1477
2022-02-10 2021-12-31 13F MERCK COM 58933Y105 26,985 -2,525 -8.56 2 0.00 0.1873
2021-10-20 2021-09-30 13F MERCK COM 58933Y105 29,510 2,525 9.36 2 0.00 0.2022
2021-07-21 2021-06-30 13F MERCK COM 58933Y105 26,985 10,509 63.78 2 100.00 0.1870
2021-04-28 2021-03-31 13F MERCK & CO. COM 58933Y105 16,476 -785 -4.55 1 0.00 0.1288
2021-01-26 2020-12-31 13F MERCK & CO. COM 58933Y105 17,261 476 2.84 1 0.00 0.1685
2020-11-09 2020-09-30 13F MERCK & CO. COM 58933Y105 16,785 -410 -2.38 1 -99.92 0.1832
2020-07-17 2020-06-30 13F MERCK & CO. COM 58933Y105 17,195 3,271 23.49 1,330 24.18 0.1910
2020-04-21 2020-03-31 13F MERCK & CO. COM 58933Y105 13,924 -1,207 -7.98 1,071 -22.17 0.2814
2020-02-05 2019-12-31 13F MERCK COM 58933Y105 15,131 50 0.33 1,376 8.35 0.3495
2019-11-14 2019-09-30 13F MERCK COM 58933Y105 15,081 12,661 523.18 1,270 525.62 0.3481
2019-07-30 2019-06-30 13F MERCK COM 58933Y105 2,420 0 0.00 203 1.00 0.0691
2019-05-07 2019-03-31 13F MERCK COM 58933Y105 2,420 -924 -27.63 201 -21.18 0.0689
2019-02-07 2018-12-31 13F MERCK COM 58933Y105 3,344 1,802 116.86 255 123.68 0.0935
2018-11-19 2018-09-30 13F MERCK COM 58933Y105 1,542 -6,134 -79.91 114 -75.69 0.0443
2018-08-10 2018-06-30 13F MERCK COM 58933Y105 7,676 -1,538 -16.69 469 -6.57 0.1723
2018-05-10 2018-03-31 13F MERCK COM 58933Y105 9,214 1,739 23.26 502 19.24 0.1742
2018-02-15 2017-12-31 13F MERCK COM 58933Y105 7,475 -11,931 -61.48 421 -66.10 0.1505
2017-10-31 2017-09-30 13F MERCK Common Stock 58933Y105 19,406 19,406 1,243 0.4912
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.